TIME TO RENEW Hot spots on the steel insert of this aluminum flywheel indicate slippage. Curiously, one portion is unmarked which suggests the finger heights of the pressure plate differed or the cover bolts may have loosened.
Single-disc clutches transmit significant power, but as power increases driveability decreases. At 650hp most single-disc units have reached their limits and switching to a dual-disc arrangement is advisable. The dual-disc maintains greater holding power and demonstrates smoother engage-
ment. If the vehicle’s priority is devoted to drag racing rather than street driving, select a metallic friction disc. Ram calls it their 900 series and it withstands heat and abuse better than the organic alternatives. Long-style and billet are the names that identify the two racing clutches. Long-
If street-driving takes priority over drag racing, an upgraded singledisc conventional strap-driven clutch assembly is hard to beat. Inexpensive, practical and civilized, its shock absorption qualities exhibit greater smoothness on the street and they will reliably transmit up to 650 hp at the drag strip...if you follow the rules.
For racers with under 1,000hp in Stock, Super Stock and single-clutch classes using Liberty, Jerico, or Lenco transmissions, the Long-style is the sensible choice. They accept all formulations of disc materials from organic to sintered iron and facilitate centrifugal and static adjustment.
www.rpm-mag.com | DECEMBER 2014
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